File sharing Applications

Hai Friends i want to develop an application to share files through internet iam using MySQL database as a back end and for developing user interfaces i am in confusion So please give me any suggestions............ to develop a user interface that connect to the internet and MySQL database..... THANK YOU............

Web application server such as Tomcat, javascript and/or php for the application, which can easily access the MySql database. Do some google searching - there are a lot of open source applications out there that do similar stuff which you can investigate for code and ideas.